Door for mines, quarries, elevator-shafts, &amp;c.



'I o. MATTHEWS.

DOOR FOR MINES, QUAREIES, ELEVATOR SHAFTS, 5w. APPLICATION FILED 00124,1908. RENEWED NOV. 2'1, 1909.

963,61 1 Patented July 5, 1910.

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nu: NORRIS PETERS co., wAsnmarcin, n. c.

c. MATTHEWSQ- DOOR FOR MINES, QUABRIES, ELEVATOR SHAFTS, dvo.

APPLICATION FILED GOT. 24,1908. RENEWED NOV. 27, 1909.

Patented July 5, 1910.

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ms NDRRIS PETER: cm, WASHINGTON, 0 c4 UNITED. ES ATENT OFFICE.

CHARLES MATTHEWS, 0F PITTSBURG, PENNSYLVANIA, ASSIGNOR OF HARRY M.BAKER, OFFR-EMONT, OHIO.

DOOR FOR MINES, QUARRIES, ELEVATOR-SHAPES, &o.

Application filed October 24, 1908, Serial No. 459, l-S4. RenewedNovember 27, 1909. Serial No. 530,243.

To all whom it may concern: 7

Be it known that I, CHARLES MATTHEWS, a citizen of the United States ofAmerica, residing at Pittsburg, in the county of Allegheny and State ofPennsylvania, have invented certain new and useful Improvements in Doorsfor Mines, Quarries, Elevator-Shafts, &c., of which the following is aspecification, referencebeing hadtherein to the accompanying drawing.

This'invention relates to doors for mines, quarries, elevator shafts,and placeswhere it is desirable to use automatically closing doors.

The primary object of my invention is to provide automatic doors whereinpositive and reliable means are employed for opening the doors upon theapproach of a car and closing the same after the car has passed betweenthe doors.

Another object of my invention is to provide a door closing and openingmechanism that can be easily operated without the attention on the partof an operator, the mechanism being simple, durable and highly efficientin connection with mine doors for maintaining the entrance to a mineclosed or for partitioning one part of a mine from another.

A still further object of my invention is to provide automatic doorsthat can be used as fire doors in elevator shafts, closures for theupper ends of blast furnaces, or in connection with variouskinds oftunnel or subway work.

With the above and other objects in view which will more readily appearas the inven-' tion is better understood, the same consists in the novelconstruction, combination and arrangement of parts to be hereinafterdescribed and then specifically claimed.

In the drawings :Figure 1 is an elevation of the automatic doors aslocated in a mine, Fig. 2 is a cross sectional view of the same, Fig. 3is a front elevation of the automatic doors, Fig. 4 is a horizontalsectional view of the same, and Fig. 5 is a perspective view of aportion of the mechanism.

In the accompanying drawings, 1 designates a mine or subway in which arelaid ties 2 for a track, comprising rails 3. One of the ties 2, which Ihave deslgnated 4, forms Specification of Letters Patent.

Patented July 5, 1910.

a sill for a rectangular door-frame 5, this door-frame being securedwithin the mine or subway. l by. concrete 6 or similar material. Thedoor-frame 5 supports a casing 7 having a door-way 8 formed therein,said casing supporting movable doors 9 adapted to close the door-way ,8.

Hinged between the rails 3 and alining longitudinally with the casing 7is a block 10 having. longitudinal grooves 11 formed therein. The doors9 are cut away, as at 12, to clear the rails 3 and slide in the grooves11 of the block 10, whereby when the doors are closed, the mine orsubway 1 will be completely partitioned.

Pivotally connected to the rails 3, as at 13, are actuating bars 14:,the inner ends of said bars terminating above the block 10 where theyare connected to a yoke-shape member formed of a pair of L-shaped straps15. Straps 15 extend downwardly through slots 16 formed in the sideedges of the tie 4 into a box-like structure 17 located in the road bedof the track. The lower ends of the straps 15 are connected together byproviding one of the straps with an enlarged end 18' having an opening19 formed therein throughwhich extends the end 20 of the associatestrap, this connection vcausing the straps to move in unison where oneof the bars 1 1 is actuated.

Within the box-like structure 17 is ar ranged two flat springs 21, saidsprings being secured to one of the ties 2 and supporting the lower endsof the straps 15. The springs 21 normally support the bars 14 at aninclination, as shown in Figs. 1, and 2, and allow said bars to recedeas a car.

passes over the rails 3.

The upper ends of the straps 15 are pro- .vided with slotted lugs 22.and loosely con nected to said lugs are bars 23, which are pivotallyconnected to the casing 7, as at 24. Pivotally connected to the forwardends of the bars 23 are connecting rods 25, said rods being pivotallyconnected, as at 26, to the short arms 27 of bell crank levers, saidbell crank levers being pivotally connected, as at 28, to the casing 7.The longer arms 29 of said bell crank levers are pivotally connected bylinks 30 to arms 31, said arms being pivotally connected, as at 32,

TWO-THIRDS To to braces 33carried by the casing 7. 'lhe upperends of thearms 31 are slotted, as at 34, toreceive pins 35 carried by the doors 9Therarms 31 are slightly bent, whereby said arms, links and the bellcrank levers can be compactly arranged within the casing 7. r V

' Operation: With a car moving upon the ail th tre f the car Wheel s.dapt ed to engage theinclined actuating, bars 14, pressing down uponsaid bars until the, bars lie in a horizontal plane with the rails 3.Upon the car wheel striking the barsl l, the doors 9 commence to open,this being accomplished by the forward ends of the bars 23 beinglowered, which through the medium of-the bell crank levers, links 30 andarms'3l gradually swing the doors 9to an open position. By connectingthe straps 15 together,- the actuating bars 14 'upon one side of thedoor-way will be lowered simultaneously with the bars upon the oppositeside of the door-way, whereby the doors will be maintained open, whilethe car passes through thedoor-way 8. As heretofore stated, the springs21 are adapted to elevate the actuating bars 14 immediately upon a carpassingo the same,'and close the doors9.

I would have it understood that coil springs can be used in lieu ofthe'flat springs will" be observedthat'the casing 7 is closed '21andthat the entirestructure can be construc'ted of light and durable metalor simi lar non-fusible material. V f Byreferring to Fig.4: of thedrawings, it

upon opposite sides and that the arms 31,

' b'ell c'ra'nk levers 29 and links 30 are exposed upon opposite sidesof the casing 7, this arrangement being; essential to maintain a closingand opening movement of the doors 9 when the bars '14 are depressed.I.re-

serve the right, however, to incase the arms, bell crank leversandlinks, wherebycoal dust .or'similar material can not lnterfere withthe operation of the automatic doors. While in the drawings forming apart of thisapplication there is illustrated the preferred "embodimentsof 'my invention, it is obvious that the same can be varied or changedas to shape, proportion and manner of assemblage without departing fromthe spirit of theinvention.

Having now described my invention what I claim as new, is a 1. Thecombination of a frame, a casing supported thereby and provided with adoor-way, doors slidably mounted in said casing and adapted to closesaid door-way, a track extending through the door-way,

longitudinally extending inclined actuating bars arranged in pairs, saidbars pivotally connected 'at one end with said track, de-

pending yoke-shaped members pivotall connected tothe confronting ends ofeac pair. of bars, springs located below and bearing against saidmembers for normally supporting the confronting ends of each pair ofbars above the plane of the track,

V 2. Thecombination of a frame, a casing carried thereby andformed witha doorway, doors arranged withinsaid casing for closing said door-way, atrack extending through said door-way, two-pairs of inclinedac'tua'ting'fbars"connected with said track, dependingyoke shape membersconnected to the confronting ends of said actuating bars,springsbengaging said members for normally maintaining the confrontin'ends of said actuating bars in an elevate position, bars pivotal yconnected to said casing and to one of theactuatin bars of each pair,arms pivotally supporte V by said casing and loosely connected with saiddoors, and means carried by said casin and actuated by a downwardmovement 0 said bars for moving the doors.

In testimony whereof I aflix mysignature in the presence of twowitnesses. I

ARtEs MATTHEWS:-

Witnesses:

K. BUTLER, A. J. TRIG G.

